Expansion of e.g.f.: x*cos(log(1+x)).

Terms

a(0) =0a(1) =1a(2) =0a(3) =-3a(4) =12a(5) =-50a(6) =240a(7) =-1330a(8) =8400a(9) =-59580a(10) =468000a(11) =-4018300a(12) =37237200a(13) =-367507400a(14) =3802780800a(15) =-40373385000a(16) =423927504000